var mongoose = require('mongoose')
var DB_URL = 'mongodb://localhost:27017/demo'


//连接
mongoose.connect(DB_URL)

//连接成功
mongoose.connection.on('connected', function() {
	console.log('Mongoose connection open to ' + DB_URL)
})

//连接异常
mongoose.connection.on('error', function(err) {
	console.log('Mongoose connection error:' + err)
})

//连接断开
mongoose.connection.on('disconnected', function() {
	console.log('Mongoose connection disconnected')
})

module.exports = mongoose;